ISelection currentSelection = HandlerUtil.getCurrentSelection(event);
		if (currentSelection instanceof IStructuredSelection) {
			IStructuredSelection ss = (IStructuredSelection)currentSelection;
			if (!ss.isEmpty()) {
				Object so = ss.getFirstElement();
				if (so instanceof EditPart) {
					Object m = ((EditPart)so).getModel();
					if (m instanceof EObject) {
						System.out.println(((EObject)m).eResource().getURI().toString());
					}
				}
			}
		}

<?xml version="1.0"?>
<workflow>
	<property name="model" value="D:\\mist\\default.mist" />
	<!--<property name="model" value="Automation/default.mist_diagram" />-->
	<!--<property name="src-gen" value="src-gen" />-->
	<property name="src-gen" value="/C:/"/>
	
	
	<!-- set up EMF for standalone execution -->
	<!--<bean class="org.eclipse.mwe.emf.StandaloneSetup" >-->
			
<bean class="org.eclipse.mwe.emf.StandaloneSetup" >
		<platformUri value="../.."/>
		<registerGeneratedEPackage value="mist.MistPackage"/> // [B]here u need to give the class name of plugin that contains ecore file (emf) [/B]
		<!-- Load GMF Notation package Don't load from model as it gives errors -->
		<registerGeneratedEPackage value="org.eclipse.gmf.runtime.notation.NotationPackage"/>
	</bean>


   <!-- instantiate metamodel -->
	<bean id="mm_emf" class="org.eclipse.m2t.type.emf.EmfRegistryMetaModel"/>  
<!-- load model and store it in slot 'model' -->
<!--<component class="org.eclipse.mwe.emf.Reader">-->
	<component class="org.openarchitectureware.emf.XmiReader">
	<modelFile value="${model}"/>	  
	  <outputSlot value="model"/>
		<firstElementOnly value="true"/>
	
	    <!--<model value="${model}"/>-->
	    
	<!--    <uri value="platform:/resource/${model}" />-->
		<!--<modelSlot value="model" />-->
	</component>

	
	
		<!-- check model -->
	<component class="oaw.check.CheckComponent">
		<metaModel idRef="mm_emf"/>
		<checkFile value="metamodel::Checks" />
		<emfAllChildrenSlot value="model" />
	</component>
	
	
	

<!--  generate code -->
	<component class="org.openarchitectureware.xpand2.Generator">
		<metaModel idRef="mm_emf"/>
		<expand
			value="template::Template::main FOR model" />
		<outlet path="${src-gen}" >
			<postprocessor class="org.openarchitectureware.xpand2.output.JavaBeautifier" />
		<fileEncoding value="UTF-8"/>
		</outlet>
	</component>
</workflow>

Starting from your own code
You can also run the generator from your own application code. Two things to note:

the contents of the properties map override the properties defined in the workflow.
The slotContents map allows you to fill stuff into the workflow from your application. This is a typical use case: you run oAW from within your app because you already have a model in memory.
  String wfFile = "somePath\\workflow.oaw";
  Map properties = new HashMap();
  Map slotContents = new HashMap();
  new WorkflowRunner().run(wfFile ,
    new NullProgressMonitor(), properties, slotContents)